How much caffeine is in Synergy kombucha?
Nutrition ℹ️ Informative

How much caffeine is in Synergy kombucha?

⏱ 21 min read · · Updated: May 16, 2026
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⚠️ Important medical information:
This article is for informational purposes only and is not a substitute for professional medical advice. Consult a healthcare professional before making any changes to your diet.

How much caffeine is in Synergy kombucha?: GT's Synergy kombucha contains on average 8 to 14 mg of caffeine per 240 ml serving, which is about one third of the caffeine content of the tea used during fermentation.

  • A very low caffeine content compared to coffee (80-100 mg) or tea (40-70 mg).
  • Fermentation naturally breaks down some of the caffeine from the original tea.
  • Synergy kombucha is suitable for most people sensitive to caffeine.
  • Residual caffeine can vary depending on the flavor and fermentation time.
  • Moderate consumption is still recommended for pregnant women and children.

How much caffeine is in Synergy kombucha? is a question many health-conscious consumers ask. According to a preliminary study cited by specialized manufacturers, fermentation reduces the caffeine to about one-third of the initial amount present in the tea. Therefore, the amount of caffeine in Synergy kombucha depends directly on the type of tea used and the fermentation time.

In short: How much caffeine is in Synergy kombucha? The answer is clear: a standard 240ml bottle of Synergy GT's kombucha contains between 8 and 14mg of caffeine, a very low amount, well below the EFSA's recommended daily intake (400mg/day for an adult). This fermented beverage is therefore suitable even for people with moderate caffeine sensitivity.

How much caffeine is in Synergy kombucha? The origin of the caffeine explained

Kombucha is produced by fermenting sweetened tea using a SCOBY (Symbiotic Culture Of Bacteria and Yeast). Tea, whether black, green, or white, naturally contains caffeine. During fermentation, the microorganisms in the SCOBY consume some of this caffeine to fuel their metabolism. As a result, the final beverage contains significantly less caffeine than the original tea.

For Synergy kombucha, the GT's brand primarily uses black and green tea as a base. Black tea contains an average of 40 to 70 mg of caffeine per 240 ml cup, and green tea approximately 20 to 45 mg. After fermentation, the caffeine content is reduced to about a third, resulting in the 8 to 14 mg of caffeine measured in Synergy products. To learn more about the role of the SCOBY in this process, see our article on the essential functions of the kombucha SCOBY.

How much caffeine is in Synergy kombucha? Comparison with other drinks

To better contextualize the amount of caffeine in Synergy kombucha, here is a comparative table with the most common drinks:

Drink (240 ml) Average caffeine content (mg)
Filter coffee 80 to 120 mg
Espresso (30 ml) 60 to 80 mg
Black tea 40 to 70 mg
Green tea 20 to 45 mg
Kombucha Synergy 8 to 14 mg
Decaffeinated beverage 2 to 5 mg

This comparison clearly illustrates that the amount of caffeine in Synergy kombucha remains very modest. A healthy adult can consume up to 400 mg of caffeine per day according to theEuropean Food Safety Authority (EFSA), which represents approximately 28 to 50 servings of Synergy kombucha. The beverage is therefore perfectly compatible with a balanced diet.

How much caffeine is in Synergy kombucha? Variations depending on the flavor

GT's Synergy range offers many flavors: Trilogy, Gingerade, Guava Goddess, Cosmic Cranberry, Mystic Mango, and many more. The caffeine content may vary slightly from one flavor to another, depending on several factors:

  • The type of tea used: Black tea-based flavors tend to contain slightly more caffeine.
  • Fermentation time: a longer fermentation reduces caffeine more.
  • Added ingredients: some flavors incorporate plant or fruit extracts which may slightly alter the composition.
  • Bottle size: 480ml formats naturally contain twice as much caffeine as 240ml formats.

Generally, the caffeine content in Synergy kombucha remains within the range of 8 to 14 mg per 240 ml, regardless of the flavor. GT's has been disclosing this information on its product labels since 2019, following nutritional transparency recommendations in the United States.

How does fermentation reduce caffeine in Synergy kombucha?

What is the caffeine content of synergy kombucha?

The fermentation process is central to caffeine reduction in Synergy kombucha. The yeasts and bacteria in the SCOBY use caffeine as a nitrogen source for their growth. This phenomenon, called caffeine biodegradation, is well-documented in the scientific literature. A study published on PubMed confirms that certain lactic acid bacteria are capable of partially degrading methylxanthines, of which caffeine is a part.

Fermentation for Synergy kombucha takes place in two phases:

  1. First fermentation (F1): the sweetened tea is fermented with the SCOBY for 7 to 30 days. It is during this stage that the majority of the caffeine is degraded.
  2. Second fermentation (F2): the beverage is bottled with natural flavorings to develop carbonation. This step no longer significantly affects the caffeine content.

How much caffeine is in Synergy kombucha? This depends primarily on the duration and conditions of the initial fermentation. GT's, recognized as one of the pioneers of commercial kombucha in the United States since 1995, has mastered this process to guarantee a consistent, low caffeine content.

How much caffeine is in Synergy kombucha? What are the recommendations for pregnant women?

TheFrench Agency for Food, Environmental and Occupational Health & Safety (ANSES) recommends that pregnant women limit their caffeine intake to a maximum of 200 mg per day. With 8 to 14 mg of caffeine per 240 ml serving, Synergy kombucha represents a very low source of caffeine. However, health authorities generally advise against kombucha for pregnant women for other reasons:

  • The presence of residual alcohol (0.5 to 3% depending on the product).
  • Unpasteurized live microorganisms.
  • The risk of bacterial contamination in the case of artisanal fermentation.

Therefore, while the amount of caffeine in Synergy kombucha may not pose a problem in itself during pregnancy, other components of the beverage warrant increased caution. Always consult your doctor before incorporating kombucha into your diet during pregnancy.

How much caffeine is in Synergy kombucha? Advice for people sensitive to caffeine

People sensitive to caffeine—suffering from insomnia, anxiety, palpitations, or acid reflux—often wonder if Synergy kombucha is suitable for them. The good news is that the amount of caffeine in Synergy kombucha is so low (8 to 14 mg) that it is generally well-tolerated, even by sensitive individuals.

Here are some practical tips:

  • Opt for 240ml formats to control your caffeine intake.
  • Avoid consumption in the evening if you are very sensitive, even with a small dose.
  • Opt for green tea-based flavors, which are slightly less rich in caffeine than black tea flavors.
  • Start with half a portion to assess your personal tolerance.

To find out what time of day to consume your kombucha, see our recommendations in our article on the best times to drink kombucha.

How much caffeine is in Synergy kombucha? The official limits you need to know

To objectively assess how much caffeine Synergy kombucha represents in your daily consumption, here are the official thresholds established by major health authorities:

  • Healthy adults: 400 mg/day maximum (EFSA, FDA).
  • Pregnant women: 200 mg/day maximum (WHO, ANSES).
  • Children (4-6 years): 45 mg/day maximum.
  • Adolescents (12-18 years): 2.5 mg/kg of body weight/day.

With 8 to 14 mg per serving, Synergy kombucha represents less than 4% of the maximum recommended daily intake for an adult. The World Health Organization (WHO) does not classify kombucha among beverages with a high caffeine content, which confirms its favorable profile.

The benefits of low caffeine content in Synergy kombucha

The low caffeine content of Synergy kombucha is a real advantage for many consumers. Unlike coffee or strong tea, this fermented beverage provides a mild stimulant effect without the side effects associated with high caffeine consumption. Among the observed benefits:

  • Less risk of sleep disruption.
  • Reduced risk of heart palpitations.
  • Better tolerance for people suffering from anxiety.
  • Suitable for consumption in the afternoon or evening for most individuals.
  • Provides probiotics, organic acids and antioxidants without an overload of stimulants.

The amount of caffeine in Synergy kombucha is therefore a significant health benefit in itself. This characteristic distinguishes kombucha from other energy drinks or concentrated teas, which are often too high in caffeine for regular consumption.

How much caffeine is in Synergy kombucha? And in homemade kombucha?

If you make your own kombucha, the caffeine content will differ from that of Synergy kombucha. It will depend on:

  • The amount of tea used per liter of water.
  • The type of tea (black, green, white, oolong).
  • The duration of fermentation.
  • The fermentation temperature.

Generally, homemade kombucha fermented for 10 to 14 days at 22-26°C will contain between 10 and 25 mg of caffeine per 240 ml, depending on the tea used. Synergy kombucha, with its 8 to 14 mg, is therefore in the lower range thanks to an optimized fermentation process. To learn how to make your own kombucha, see our guide on how to make homemade kombucha.

How much caffeine is in Synergy kombucha? What does the label say?

What is the caffeine content of synergy kombucha?

GT's Synergy has been displaying caffeine content directly on its labels for several years, a transparency practice appreciated by consumers. The standard statement reads "contains approximately 8-14 mg of caffeine per serving." This information complies with the U.S. FDA's beverage labeling requirements.

In France and Europe, regulations require caffeine labeling for beverages containing more than 150 mg/L. With approximately 33 to 58 mg/L, Synergy kombucha is below this threshold, but the brand still chooses to provide this information for the sake of transparency. The caffeine content of Synergy kombucha is therefore readily available and verifiable directly on the packaging.

How much caffeine is in Synergy kombucha? A practical summary to help you choose wisely

The caffeine content of Synergy kombucha remains one of the most sought-after pieces of information for new consumers of this fermented beverage. To make the right choice, keep these key points in mind:

  • 8 to 14 mg of caffeine per 240 ml serving: a very low content.
  • Well below the recommended thresholds for all profiles (adults, seniors, adolescents).
  • Fermentation is the primary mechanism for caffeine reduction.
  • The content varies slightly depending on the flavors and type of tea used.
  • Pregnant women should consult a doctor before consumption, not for the caffeine but for other components.
Key points to remember about How much caffeine is in Synergy kombucha?

  • How much caffeine is in Synergy kombucha?: approximately 8 to 14 mg per 240 ml serving, which is a very low level.
  • How much caffeine is in Synergy kombucha? It is naturally reduced by the fermentation of the SCOBY, which degrades about two-thirds of the initial caffeine from the tea.
  • How much caffeine is in Synergy kombucha? It varies slightly depending on the flavor, the type of tea, and the fermentation time chosen by GT's.
  • How much caffeine is in Synergy kombucha? It remains well below the 400 mg/day recommended by the EFSA for a healthy adult.
  • How much caffeine is in Synergy kombucha? is clearly indicated on the label of each bottle, guaranteeing total transparency for the consumer.

Frequently asked questions about How much caffeine is in Synergy kombucha?

How much caffeine is in Synergy kombucha exactly?

GT's Synergy kombucha contains approximately 8 to 14 mg of caffeine per 240 ml serving. This amount is indicated on the product label and corresponds to about one-third of the caffeine present in the tea used before fermentation.

Does Synergy kombucha contain more caffeine than coffee?

No. Synergy kombucha contains 8 to 14 mg of caffeine per 240 ml, compared to 80 to 120 mg for a filter coffee of the same volume. The caffeine content of Synergy kombucha is therefore 6 to 10 times lower than that of coffee, making it a much gentler alternative for the nervous system.

Can you drink Synergy kombucha if you are sensitive to caffeine?

Yes, in most cases. With only 8 to 14 mg of caffeine per serving, Synergy kombucha is generally well-tolerated by people sensitive to caffeine. It's advisable to start with a small amount and avoid consuming it in the evening if you are very sensitive.

Does the caffeine content of Synergy kombucha vary depending on the flavor?

Slightly. Black tea-based flavors may contain a little more caffeine than green tea-based ones. However, all Synergy flavors remain within the 8-14 mg range per 240 ml serving, according to the data provided by GT's on its product labels.

Why does fermentation reduce caffeine in Synergy kombucha?

The bacteria and yeast in the SCOBY use caffeine as a nitrogen source during fermentation. This biodegradation process reduces the caffeine content by about two-thirds compared to the original tea. This is why Synergy kombucha contains significantly less caffeine than the tea from which it is made.

Can pregnant women drink Synergy kombucha?

The low caffeine content of Synergy kombucha (8 to 14 mg) is not inherently problematic during pregnancy. However, health authorities advise against kombucha for pregnant women due to its residual alcohol content and unpasteurized live microorganisms. Consult your doctor before consumption.

How many bottles of Synergy kombucha can one drink per day without exceeding the recommended caffeine intake?

A healthy adult can consume up to 400 mg of caffeine per day, according to the EFSA. With a maximum of 14 mg per 240 ml serving, this theoretically represents up to 28 servings of Synergy kombucha. In practice, 1 to 2 bottles per day is the usual recommended consumption to benefit from its probiotic properties.

Is Synergy kombucha considered a decaffeinated beverage?

No. Synergy kombucha is not officially classified as a decaffeinated beverage because it still contains 8 to 14 mg of caffeine per serving. To be labeled decaffeinated, a beverage must contain less than 2 to 5 mg of caffeine. However, Synergy kombucha remains very low in caffeine compared to other common beverages.

Can the caffeine in Synergy kombucha disrupt sleep?

With only 8 to 14 mg of caffeine per serving, Synergy kombucha rarely disrupts sleep in healthy adults. For comparison, a cup of coffee contains 6 to 10 times more caffeine. However, those who are very sensitive to caffeine may prefer to avoid consuming Synergy kombucha after 6 p.m. as a precaution.

How does GT's calculate the caffeine content of its Synergy kombucha?

GT's measures the caffeine content of its Synergy kombucha through laboratory analysis of the finished products. The brand takes into account the type of tea used, the initial caffeine concentration, and the reduction induced by fermentation. This data is then included on the bottle labels to inform consumers.

Does Synergy kombucha contain other stimulants besides caffeine?

Synergy kombucha contains theanine, an amino acid naturally present in tea, which modulates the effects of caffeine and promotes a state of calm and focus. It also contains small amounts of theobromine, a mild stimulant. These compounds work synergistically with the low dose of caffeine for a balanced overall effect.

What is the difference in caffeine content between Synergy kombucha and homemade kombucha?

Synergy kombucha contains 8 to 14 mg of caffeine per 240 ml thanks to a controlled fermentation process. Homemade kombucha can contain between 10 and 25 mg depending on the tea used and the fermentation time. Synergy kombucha is therefore at the lower end of this range, thanks to the industrial optimization of its recipe.

How much caffeine is in Synergy kombucha? What you need to know

How much caffeine is in Synergy kombucha? The answer is clear and reassuring: with 8 to 14 mg per 240 ml serving, this fermented beverage is among the lowest-caffeine options on the market. Fermentation using the SCOBY naturally reduces the caffeine to about a third of the tea's initial content, making Synergy kombucha accessible to the vast majority of consumers, including those sensitive to stimulants. Therefore, knowing the caffeine content of Synergy kombucha remains a reassuring factor when incorporating this probiotic drink into your daily routine, provided you consume it in moderation and consult a healthcare professional if you have any concerns.

Studies and scientific sources

The HerbForge team

Updated on May 9, 2026



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This article is provided for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before use.

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